Dear [Friend's Name],

I hope this message finds you in good spirits. First and foremost, I want to express my heartfelt apologies for any inconvenience or hurt that I may have caused you recently. It was never my intention to upset you, and I deeply regret any negative impact my actions might have had on our friendship.

Reflecting on the situation, I realize that I could have handled things differently. I understand if you feel disappointed or let down, and I am truly sorry for not being more considerate at that time. Our friendship means a lot to me, and I value your trust and support more than words can describe.

Please know that I am committed to making amends and ensuring that such an incident does not happen again. If there is anything specific you would like to discuss or any way I can make it right, please don’t hesitate to let me know. Your feelings are important to me, and I want to do everything I can to restore the harmony between us.

Thank you for taking the time to read this. I hope we can move past this together and continue to enjoy the wonderful bond we share. You mean so much to me, and I am grateful for your understanding and patience.

With sincerest apologies,

[Your Name]

This letter is crafted with sincerity and avoids overly formal language, making it feel personal yet respectful. The goal is to convey genuine remorse while maintaining a friendly tone.